Transmission filter



FIG. 1 is a top plan view of a transmission filter according to the inventive design;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a bottom-side elevation view thereof;

FIG. 4 is a top-side elevation view thereof;

FIG. 5 is a right-side elevation view thereof; and,

FIG. 6 is a left-side elevation view thereof.

The ornamental design, which is claimed, is shown in solid lines in the drawings. Any broken lines in the drawings are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for a transmission filter, as shown and described. 